fix(rootScope): make stopPropagation only stop its own event

All sibling event handlers residing on the same scope to were stopped
if one of them called stopPropagation.

Closes angular#4204

src/ng/rootScope.js

@@ -867,12 +867,14 @@ function $RootScopeProvider(){
               continue;
             }
             try {
+              //allow all listeners attached to the current scope to run
               namedListeners[i].apply(null, listenerArgs);
-              if (stopPropagation) return event;
             } catch (e) {
               $exceptionHandler(e);
             }
           }
+          //if any listener on the current scope stops propagation, prevent bubbling
+          if (stopPropagation) return event;
           //traverse upwards
           scope = scope.$parent;
         } while (scope);

test/ng/rootScopeSpec.js

@@ -1060,6 +1060,14 @@ describe('Scope', function() {
         expect(log).toEqual('2>1>0>');
       });
 
+      it('should allow all events on the same scope to run even if stopPropagation is called', function(){
+        child.$on('myEvent', logger);
+        grandChild.$on('myEvent', function(e) { e.stopPropagation(); });
+        grandChild.$on('myEvent', logger);
+        grandChild.$on('myEvent', logger);
+        grandChild.$emit('myEvent');
+        expect(log).toEqual('2>2>2>');
+      });
 
       it('should dispatch exceptions to the $exceptionHandler',
           inject(function($exceptionHandler) {